## Continuation of ndarray Notes on Machine Learning

Index and Slice of Array
Index of multidimensional arrays
1 import numpy as np
2 arr=np.arange(1,25).reshape(2,3,4)
3 arr
4 # output array([[[ 1, 2, 3, 4],
5 [ 5, 6, 7, 8],
6 [ 9, 10, 11, 12]],
7
8 [[13, 14, 15, 16],
9 [17, 18, 19, 20],
10 [21, 22 ...

Posted by **mmoussa** on *Tue, 20 Aug 2019 06:54:43 -0700*

## Knapsack Series Problems

I. 01 knapsack problem
Concept: Every item can be taken only once
Solution: See if the last item can go into the backpackMaximum type problem
n items, known the weight of each item, backpack can bear the weight w, to find the maximum weight can be lo ...

Posted by **weevil** on *Tue, 20 Aug 2019 02:12:11 -0700*

## FTL Basic Grammar

FTL Basic Grammar
1. Character output
2. Date Output
3. Digital Output (Take Digital 20 as an Example)
4. Declarative variables
5. COMPARISON OPERATOR
6. Arithmetic Operators
7. Logical Operators
8. Operator priorities in FreeMarker are as follows ...

Posted by **jerr0** on *Tue, 20 Aug 2019 01:08:37 -0700*

## Python Command Line Travel - Deep into argparse

Author: Hello GitHub-Prodesire
Hello GitHub's "Explaining Open Source Projects" series, project address: https://github.com/HelloGitHu...
Preface
In the first article "A Preliminary Exploration of argparse", we have a preliminary grasp of the use of argparse's tetralogy, which has a basic sense of body.But what types of par ...

Posted by **aaaaCHoooo** on *Tue, 20 Aug 2019 01:08:04 -0700*

## HDU 6681 Dendritic Array Euler Formula

To give a rectangular pin, a k-knife, each of which is a ray with non-coincident vertices and parallel axes in the cake, ask to cut the pin into several pieces.
Euler's formula: V_E+F=2V-E+F=2V_E+F=2 points_edges+polygons=2 points-edges+polygons=2 po ...

Posted by **deffe** on *Mon, 19 Aug 2019 20:04:20 -0700*

## Java implements maximum (small) heap and heap sorting, TopN problems

Java implements maximum (small) heap and heap sorting, TopN problems
Articles Catalogue
Java implements maximum (small) heap and heap sorting, TopN problems
Java implementation heap
Reactor Construction
Insertion of heap
Heap deletion
Specific ...

Posted by **perezf** on *Mon, 19 Aug 2019 05:00:41 -0700*

## Has the thread pool been used?

Has the thread pool been used?
Thread pool advantage
The main task of thread pool is to control the number of running threads, put tasks into the queue in the process of processing, and then start these tasks after thread creation. If the number ...

Posted by **Niyati_1984** on *Mon, 19 Aug 2019 01:28:30 -0700*

## TensorFlow Learning Records: Activation Functions

The main function of activation function is to add non-linear factors to solve the problem that linear models can not be multi-classified. It plays a very important role in the whole neural network.
Because the mathematical basis of the neural networ ...

Posted by **AdamSnow** on *Sun, 18 Aug 2019 22:24:22 -0700*

## vue development environment based on Web pack 4.x at novice level

Using webpack 4.x to build vue development environment in the initial stage
Guide reading
First of all, in this chapter, I will take you hand in hand to build a vue development environment using webpack 4.x. Students here may ask?
"There ar ...

Posted by **tbone-tw** on *Sun, 18 Aug 2019 21:28:01 -0700*

## Case 17. Archiving the Old Log

There is log rotate in Linux system. It can cut and archive old logs according to our expectation. It can also compress the cut logs and define the retention time of old logs.
The requirement of this case is to use shell script to implement logrotate-like functions. Specific requirements are as follows:
1) The log path to be processed: / data/ ...

Posted by **psychosquirrel** on *Sun, 18 Aug 2019 21:20:54 -0700*